I installed Enhanced soundtrack part 1 and 2 by Enigmus, it ran smoothly for a day and a half then all music stopped, just gone, so I got rid of the mod, and no vanilla music, so then got another music mod, still no music.

Sounds simple, sounds dumb, I know but I also used Enhanced Soundtrack for awhile until I realized that some of the music tracks were of poor quality or just not loud enough even with my speakers turned up. When I uninstalled the mod it took a couple of days before I noticed I wasn't getting the music when you fight dragons or the little tune that plays when you learn a new thum. Sure enough, I checked out my audio options and the music was set to completely off.